- Obituary (1617 Hits)
- Obscurity (2754 Hits)
- Officium Triste (1266 Hits)
- Omission (1173 Hits)
- Omnium Gatherum (73 Hits)
- Onheil (759 Hits)
- Onkel Tom Angelripper (808 Hits)
- Onslaught (1446 Hits)
- Oppressus (1433 Hits)
- Orae (1299 Hits)
- Orden Ogan (1219 Hits)
- Out For Blood (861 Hits)
- Outrage (JPN) (299 Hits)
- Overkill (1177 Hits)
- Ozzy Osbourne (1337 Hits)